package com.lscl.pay;


import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;

import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/pay")
public class Pay extends HttpServlet {

    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws IOException {

//获得初始化的AlipayClient
        AlipayClient alipayClient = new DefaultAlipayClient(com.alipay.config.AlipayConfig.gatewayUrl, com.alipay.config.AlipayConfig.app_id, com.alipay.config.AlipayConfig.merchant_private_key, "json", com.alipay.config.AlipayConfig.charset, com.alipay.config.AlipayConfig.alipay_public_key, com.alipay.config.AlipayConfig.sign_type);

        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(com.alipay.config.AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(com.alipay.config.AlipayConfig.notify_url);

        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");
        //付款金额，必填
        String total_amount = new String(request.getParameter("total_amount").getBytes("ISO-8859-1"),"UTF-8");
        //订单名称，必填
        String subject = new String(request.getParameter("subject").getBytes("ISO-8859-1"),"UTF-8");
        //商品描述，可空
        String body = new String(request.getParameter("body").getBytes("ISO-8859-1"),"UTF-8");

        alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                + "\"total_amount\":\""+ total_amount +"\","
                + "\"subject\":\""+ subject +"\","
                + "\"body\":\""+ body +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
        //alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
        //		+ "\"total_amount\":\""+ total_amount +"\","
        //		+ "\"subject\":\""+ subject +"\","
        //		+ "\"body\":\""+ body +"\","
        //		+ "\"timeout_express\":\"10m\","
        //		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节

        //请求
        String form = null;
        try {
            form = alipayClient.pageExecute(alipayRequest).getBody();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }

        response.setContentType( "text/html;charset=UTF8");
        response.getWriter().write(form); //直接将完整的表单html输出到页面
        response.getWriter().flush();
        response.getWriter().close();

    }
}
